And racial.

Look at Alaska on your map.
Guess why those areas of the state are Democrat?
Heck, look at New Jersey - a state everyone assumes is 100% Democrat. It isn't, and even the mid-state Burlington County that is blue in the map is divided by racial lines.
Same thing in the deep South - that ketchup stain of blue is racial. Same thing in the border states of CA, AZ, TX, NM.
If we have another Civil War, it won't be North vs. South. The fighting will be house to house.
Turn off the welfare spigot and the problem of blue areas takes care of itself.
Secession is not the same as civil war. In fact, secession could let the nation avoid civil war. However, the left will never allow anyone to escape their power. They will find a new use for Trump’s border wall: keeping their victims from escaping.
And the power will be out. No one factors that into a civil war. The power will be out and half the population will die from this reason alone.
“And racial...”
Yes, there is a very strong symbiotic relationship between leftists and blacks.
Leftists inhabit a world view of oppressor vs oppressed and blacks because of their lack of success in life (for reasons no one dares to talk about) serve as the perfect and permanent “oppressed” class that the left can point to, to ustify their world view.